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2002
ACM

Movement model, hits distribution and learning in virtual keyboarding

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Movement model, hits distribution and learning in virtual keyboarding
In a ten-session experiment, six participants practiced typing with an expanding rehearsal method on an optimized virtual keyboard. Based on a large amount of in-situ performance data, this paper reports the following findings. First, the Fitts-digraph movement efficiency model of virtual keyboards is revised. The format and parameters of Fitts' law used previously in virtual keyboards research were incorrect. Second, performance limit predictions of various layouts are calculated with the new model. Third, learning with expanding rehearsal intervals for maximum memory benefits is effective, but many improvements of the training algorithm used can be made in the future. Finally, increased visual load when typing previously practiced text did not significantly change users' performance at this stage of learning, but typing unpracticed text did have a performance effect, suggesting a certain degree of text specific learning when typing on virtual keyboards. Keywords Graphical ...
Shumin Zhai, Alison E. Sue, Johnny Accot
Added 01 Dec 2009
Updated 01 Dec 2009
Type Conference
Year 2002
Where CHI
Authors Shumin Zhai, Alison E. Sue, Johnny Accot
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